UK Box Office 12th January, 1979
| Title | Weekend | Week | Total | % Change | Total Weeks | ||
| 1 (1) |  | Superman (1978) | £346,420 | £467,667 | £12,643,762 | -50% | 5 |
| 2 (2) |  | Jaws 2 (1978) | £301,323 | £421,852 | £2,103,233 | -44% | 3 |
| 3 (3) |  | Watership Down (1978) | £41,885 | £58,639 | £989,761 | -52% | 5 |
| 4 (4) | Piranha (1978) | £7,416 | £10,753 | £763,405 | -52% | 8 | |
| 5 (5) |  | Heaven Can Wait (1978) | £5,662 | £7,361 | £1,326,617 | -17% | 12 |